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T. O. HUGHES.

NUT LOOK.

N0. 391,974. Patented Oct. 30, 1888.

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NITED STATES EATENT ()rrica TYRE G. HUGHES, OF KANSAS CITY, KANSAS,ASSIGNOR OE THREEFOURTHS TO ERNEST E. SMITH, FIRMIN B. VRIGHI, AND JOHNL. STU BBLEFIELD,

ALL OF SAME PLACE.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 391,974, dated October30, 1888.

Application filed June 7, 1888. Serial No. 276,300, (Model) To all whomit may concern:

Be it known that l, TYRE G. HUGHES, of Kansas Oity,\Vy2\1idotte county,State of Kansas, have invented certain new and useful Im- 5 provementsin Nut-Locks, of which the following is a full, clear, and exactdescription, reference being bad to the accompanying drawings, forming apart hereof.

My invention relates to devices for securing different portions ofstructures together, particularly rail-joints; and it may be said toconsist in the peculiar construction, combination, and arrangementofparts hereinafter set forth, and pointed out in the claims.

In the drawings, which illustrate the man ner of carrying out myinvention, Figure 1 is a plan view of the device applied to a railjoint.Fig. 2 is a perspective view of the parts detached from each other, andFig. 3 is a face view of the nut used in making up the invention.

A indicates an ordinary nut with a spiral recess, A, cut in its face forthe reception of metallic eompressionwasher G. Said washer 2 5 iscomposed of laminated coils a and b, formed integral at one end, andhaving their opposite ends separated and provided with raisedprojections c and d, respectively.

During use the washer O is to be located 0 upon bolt B intermediately offish-plate D and nut A, as an ordinary washer would be located, and uponscrewing into place, the projection 0 will come in contact with shouldere in recess A, and said washer will be revolved 5 with said nut. As theonward movement of the nut is continued, however, said washer will berevolved therewith until said nut is properly tightened in place, whenthe burr or projection d will slightly out into face of fishplate D, andthereby be prevented from turning back. The nut A is held in positionand kept from turning back by reason of the fact that the pitch of thespiral recess A is greater than that of the thread on the bolt.Consequently when the nut is to be removed it must come off of thewasher faster than it comes off the bolt, which it will not do unlessaided by a wrench. The nutAis thus securely locked in position untilremoved by hand in the or dinary way.

Having thus described my invention, what I claim is- 1. A11 improvednut-fastener composed of two laminated rings of metal cut at a pointcommon to both, formed integral at corresponding ends,and having theiropposite ends free and separated, and a cutting projection formed uponthe outer face of one ring at its 'free end, substantially as described.

2, An improved nut-fastener composed of two laminated rings, a I), cutat a common point, secured together at corresponding ends, and havingtheir opposite ends separated and provided with raised projections c andd, respectively, said projections being oppositely located upon theouter faces of said rings, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

TYRE O. HUGHES.

Witnesses: F. G. FISCHER, J. O. HIGDON.

